The vinegar fly Drosophila suzukii Matsumura (Diptera: Drosophilidae), commonly known as spotted winged drosophila (Fig. 1a) is a highly polyphagous invasive pest, native to Asia, which causes significant damage to a wide variety of berry and stone fruit crops. The chapter reviews the significant progress that has since been made in understanding the biology of the fly, providing key information required for the development of sustainable and integrated control methods. The chapter assesses the fly’s impact on crops and describes its biology and ecology, host range and host susceptibility, detection methods and management and control strategies.